Refractory Prefabricated Parts are preformed, high-temperature fired or treated refractory products with specific shapes and sizes, which can be directly used for masonry or repair of industrial kilns, high-temperature equipment and other occasions. Through standardized production, they can significantly improve construction efficiency and reduce the difficulty of on-site operations. The following is a detailed introduction to prefabricated refractory parts:
The main types of refractory precast parts are:
1. Classification by material:
Silicon-aluminum series: such as high-aluminum and clay, suitable for medium and high temperature environments of 1300~1600℃.
Alkaline: magnesium and magnesium-chromium, used in alkaline corrosive environments such as steelmaking converters and electric furnaces.
Carbon-containing: such as aluminum-carbon and magnesium-carbon, strong resistance to slag corrosion, commonly found in ladles and hot metal tanks.
Special materials: silicon carbide and zircon, used in extreme conditions (such as high temperature and strong chemical corrosion).
2. Classification by shape:
Standard bricks, special-shaped bricks (arch foot bricks, burner bricks, etc.).
Large prefabricated blocks (such as kiln roof and door components).
Functional components (such as thermocouple sleeves and radiant tubes).
The production process of refractory prefabricated parts is as follows:
Raw material ratio: Mix aggregate (such as bauxite, corundum), binder (phosphate, cement, etc.) and additives according to performance requirements.
Molding: Use vibration casting, machine pressing or ramming to ensure density.
Drying and firing: After low-temperature drying, high-temperature sintering (some products do not require firing, such as chemically bonded prefabricated parts).
Post-processing: Precision grinding to meet dimensional tolerances.
Core performance indicators of refractory prefabricated parts:
Refractory: usually ≥1580℃.
Thermal shock resistance: the ability to resist sudden temperature changes (such as the number of cycles).
Compressive strength: mechanical strength at room temperature and high temperature.
Chemical stability: the ability to resist slag and gas erosion.
Application areas of refractory prefabricated parts:
Steel industry: converters, torpedo tanks, heating furnace linings.
Cement kilns: preheaters, grate cooler components.
Glass melting furnaces: flow holes, breast wall prefabricated blocks.
Chemical industry/power: cracking furnaces, key parts of incinerators.
The refractory prefabricated parts produced by Haixin Refractory Materials have the advantages of convenient construction, reducing on-site cutting and pouring time, and shortening construction period. Their quality is stable, and they are produced in the factory with temperature and humidity control, and their performance is better than on-site construction; long life: high density and low porosity design extend the service life.